Bus bar



FIG. 1 is a top, front, right perspective view of a bus bar showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view thereof.

The broken lines immediately adjacent to the shaded area depict boundaries of the claimed design and form no part thereof. The broken lines in the drawings depict portions of the bus bar that form no part of the claimed design. 

CLAIM We claim the ornamental design for a bus bar, as shown and described. 